How to treat two mismatched teeth? One on back side, one on top of another tooth only by a little. Both are in upper jaw (Photo)

Treating misaligned teeth like the ones you described, where one is slightly behind another and overlapping, depends on the severity of the misalignment and your overall dental health. Here are a few potential treatment options:
Braces or Clear Aligners: If the misalignment is more than minor, braces or clear aligners (like Invisalign) could help gradually move the teeth into the correct position. These options work over time to align the teeth, and they can address both the aesthetics and function of your bite.
Tooth Reshaping: In cases of minor overlap, some dentists may recommend tooth reshaping or contouring. This involves carefully shaving a small amount of enamel to create more space and make the teeth appear more aligned.
Bonding or Veneers: If the misalignment is minimal but affects the appearance, bonding or dental veneers could be an option. This involves placing a thin layer of material over the tooth to create the appearance of a straighter smile.
Extraction and Orthodontics: In some cases where crowding is severe, an extraction may be recommended, followed by orthodontic treatment to align the remaining teeth.
Consulting with an orthodontist or a cosmetic dentist is the best way to determine the most effective treatment plan for your specific situation. They can evaluate your bite, the alignment of your teeth, and recommend the best course of action based on your dental goals.